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21L.B.121 Initial oversight investigation of a declaration of design compliance of a major change to the design of an aircraft for which design compliance has been declared

Available versions for ERULES-1963177438-21318

Regulation (EU) 2022/1358 found in: Initial Airworthiness and Environmental Protection (No 748/2012) Part-21 Part-21L (Jul 2024)

Version Text

21L.B.121 Initial oversight investigation of a declaration of
design compliance of a major change to the design of an aircraft for which
design compliance has been declared

Regulation (EU) 2022/1358

(a)     Upon
receiving a declaration of design compliance for a major change to the design
of an aircraft for which design compliance has been declared, the Agency shall
verify that the change is within the scope of point [21L.A.101](#_DxCrossRefBm1649097714) and that the declaration
contains all the information specified in point [21L.A.107](#_DxCrossRefBm1649097945). The Agency shall acknowledge
the receipt of the declaration, including the assignment of an individual
declaration of design compliance reference number to the declarant.

(b)     The
Agency shall assess, based upon the risk of a non-compliance leading to a
design that is not capable of safe flight or being environmentally
incompatible, whether a physical inspection and assessment of the changed
product is needed, and subsequently inform the declarant if that is the case.
This assessment of the risk shall take into consideration:

1.       the
complexity of the major change and the overall effect on the aircraft
structures, flight characteristics and systems;

2.       previous
experience of physical inspections of aircraft and major changes that have
been designed by the declarant;

3.       the
response by the declarant to any previous findings that have been raised for
non-compliances for the specific aircraft or similar aircraft designed by the
declarant that have also been subject to a declaration of design compliance.

(c)      If
the Agency finds evidence in the declaration, or through the physical
inspection and assessment if carried out in accordance with point (b) of point
[21L.B.121](#_DxCrossRefBm1649097965), indicating that the changed
aircraft could be incapable of conducting a safe flight or could be
environmentally incompatible during in-service operations, the Agency shall
raise a finding in accordance with point [21L.B.21](#_DxCrossRefBm1649097779).